The Big House is a large blue house which serves as the main administrative building at Camp Half-Blood, Chiron and other Camp Half-Blood staff members including all cabin leaders of each Olympian gods and goddesses usually have their meetings there and it serves as the main infirmary for the camp. There are four floors, a basement and an attic in the big house. It also has a fireplace in which it is lit up depending on the mood of all of the demigod campers. It is home to Chiron and the satyrs. All new campers go here to see the orientation film, as well as meet Chiron.